Roller-bearing.



affzmm.

ROLLER BEARING'.

APPLICATION FILED MAB.. 20,1907.

2 MEETS-SHEET 1. 1

Patented Dec. 6,

UNITED STATES pagana? onnioa.

OSWALID F. ZAHN, F LOS ANGELES, CALIFORNIA, ASSIGNOR TO SELF BGETNG- ROLLER BEARING COMPANY, OF LOS ANGELES, CALIFORNIA, A CORPORATION OF CALIFORNIA.

evince.

B ,OLLER-BEARING.

Specification of Letters VPatent. Patented Dec. G, i910.'

applicativa mea Maren 2o, 1907. serial No. 363,519.

is to eliminate o r reduce as far aspossible the wear of the engaging'parts of a roller bearing, particularly in the type of bearings wherein the rollers are maintained in proper position by the engagement of flanges and grooves on the bearing membersand rollers. In suchl cases the wear comes principally at the corners or shoulders of the flanges and rollers, and the main object of the-present invention is to provide means whereby the thereby practically eliminating the tendency engagement at these ortions will be to a certamextent of a yie ding or elastic nature to out and grind such portions.

Another object of the invention is to provide a roller bearing wherein the parts will be so supported as to produce a certain amount of cushion effect for all of the strains produced therein.

The invention further relates to a roller` bearing. wherein the bearing rollers are maintained in proper position .by positive defiecting forces brought into action on skewing of the rollers from such proper position, and an object of the invention in this connection is to provide a roller bearing of this character wherein such forces` will be exerted substantially at one end of the roller, the necessary flanges and grooves being formed only at one end, thereby sim lifying the construction of the rollers and earings and facilitating the placing on or removal of the same from an axle. Another object of the invention in connection with aself rectifying roller bearing is to utilize the spacing rollers thereof. asa

means. lof rectiication.

Another object is to provide means at one end only of-the rollers' for taking the end thrust or longitudinalniovement of the load' sustaining rollers, and simultaneously there.- with taking the end thrust or relative longitudinal movement of both bearing members and at the same time producing 'a simple, self contained structure that` can be easily slipped on or off of an `axle.

.In the accompanying drawings :-Fig`ure 1 is a longitudinal section of a rolle:` bearing embodying the invention, as adapted for a car axle bearing. In this iigure. some of the bearing rollers are omitted for clearness.'

' Fig. 2 is an elevation of the rectifying abutment ribmembers 1n such roller bearing.

Fig. 3 is an elevation of another set of rectifying abutmentrib members in said bear-f ing'. Fig. 4 is a vertical section on line :v4 Fig. 1. Fig. 5 is a 'vertical detail section of an end portion of one of the bearing rollers and of acollar for attachment thereto. Fig. 6 is an end elevation of said collar.' Fig. 7 is a sectional elevation of a different form ofcollar. Fig. 8 is a partial longitudinal section showing a different form of the roller bearing, adapted for a vehicle wheel. Fig. 9 is a ongitudinal section of another form of roller bearing as applied to a crank pin. Fig. 10 is atransverse section on Vline m1@ in Fig. 9. Fig. 11 is a longitudinal section of another' form of the roller bearing adapted for use Where the outer bearing member is stationary. Fig. 12 is a lrgtgitudinal section of another form of the' roller bearing, sh'owing the'.bigndr scope ofthe invention. Fig. 13 is a ongtudinal section of another form of the rollen bearing in which ball bearings are usci-,for taking end thrust.v

Reft'irring tg, l, the inner bearing member 1 is represented as asleeve on a shaft or axle, for. example, a railroad axle journal 5, and th outer bearing member if 1s re resented as a` sleeve in a box or bearing 6 o said journal. The bearing rollers 3 and spacing rollers 4 are arrangd'in circular series between-these bearing members.

An elast-ic or cushion pad 7 is provided be- Sil tween the bearing member or cylinder :2 and box'niember 6 to give a uniform pressure on the sleeve and to moderate the effect of jar due to vibration or jolting of the bearings, said box having depressions 9 in which the ad extends to prevent-turning and pro.- jectlons 8 which engage with the end capsto prevent their turning. The usual s )ring devices and pedestal means are provi edin connection with the box for supporting the truck on the bearing, except that the guides on the sides are extended upward. The bearing rollers 3 are each ooved or reduced as at 10 to form the engaging wall 12 which must be of less diameter than the rolling diameter of the bearing roller. and is preferably beveled or rounded. This groove receives the annular abutments 13, 14,1espectively on the inner and outer bearing meinbers, said abutments being vadapted to engage by their outer faces, that is tosay the faces which are directed away from the mid length of the rollers, against the wall of the groove which is farthest from mid length of roller or wall 12. The groove 10 yin the bearing roller is suiiicietly wide toA prevent engagement of the other wall or face of said groove withtthe said annularv members 13, 14, means being provided to retain the bearing rollers from moving longitudinally outward `to avoid .such engagement. Such means are here shown as consisting of an'enlarged roller rib or collar 16 on the end of each bearing roller adapted '-to rotate with the roller and to engage by its outwardly directed face the inwardly directed faces of two-annular abutments 18, 19, respectively on the inner and outer bearing members. It is desirable that the largest diameter of the abutment 18 on the inner bearing member be slightly less than that of the bearing surface of theinner bearing member and that the smallest diameter of `the abutment 19 be of slightly largerl diameter than the diameter of the bearing surface of the outer bearing member so that rectifying results will be assured. Itrfis also desirable that the edges of both grooves and ribs berounded to some degree.

Abutment 14 Ais held from rotating by means of keys or projections 11 engaging notches in the sleeve 2, and the abutment 13 is secured by means of projections 17 which enter in slots 24: in thel journal member 1.

The abutment 18 is carried by a bur'2() screwing on the end of journal 5 and secured by set screw 21,*said bur having a beveled side embracing the abutment 18, the latter having notches 23 engaging with projections on the bur to prevent rotating. The abutment 19 is carried by a cap member- 25 screwing on the end4 of the outer bearing member 2, said abutment entering within the said cap and being held in place by projections 26 which engage in notches 27 in said abutment. This construction closes the 'outerend of the bearing.- The inner endof the bearing'may be closed by asket located that the .retaining rings bear against` the inwar'dly facing walls of the grooves in the bearing l'rollers and against the outwardly'facing walls of the grooves in the spacing rollers.

To explain the mode 'of operation in Fig. 1, imagine the outer bearing member 2 stationary and 'inner bearing meniber 1 revolving in the direction o'f` the arrow.` The bearing rollers will then lbe revolving within and in Contact with the# outer bearing member in the samel direction as' arrow, but will be rollingbackward, as it were, on the inner bearing member. Imagine a roller skewing, the left hand end leading, as related to the outer-.bearing member. rlhe roller will thenin its further movement drift towardthe right hand end and the wall of groove at 12 will engage with the abutment 14 on' outer bearing meniber, and the friction. developed -will retard that end. But suppose the roller is skewed 4stored to a correct position.. Thusthe roove means 10 corrects a roller whenit drifts in one direetionand the ribv means l'corrects the roller when it. drifts in the other direction. By having interengaging portions on both bearing members as shown, the rollers will receive t ice the reetifying effects, and in addition bbome a means to take the endthrust of the bearing member or rather will transmit the end thrust to the rolling surface of the bearing roller. -To describe this action suppose there is an end pressure on the right as per arrow so as to engage the end of the rollers. 'The engagement will then be between abutment 19 and roller 'rib 1G. If the end pressure is great enough, then the rollers will in turn be pushed'in the same direction until the inwardly facing wall at 12 engages the inner bearing member abutment 13. The former roller engagement will cause the left hand end of 120 the roller to lead so that in its further movement it will drift toward the right hand, thus releasing the pressure on the ribl The latter roller engagement causes the left hand end of the roller to lag as related 'to 1.25

the inner bearing member, but to go for- Iward 'as related to the outer bearing membei', so that the rollers are from two sources skewed temporarily into a favorable position that. will in their further movement -130 in -just the opposite way, andthe left hand end is lagging. The roller will then in its the outer bearing member Pushing it toward. l10- "that end of the roller.

' abutments 18, 19.

`rari'y the outer bearing member toward the and pressure, thus automatically counter- :ictiiig the end pressure of the bearing meinbers and at the saine time releasing all heavy strains on the interengagingportions. The end play of the rollers, the eiid thrust of the bearing members, and all wear on the longitudinal engagements on the rollers can be easily adjusted by turning the bui' 2() and the rap 25 to ai suitable point. ln this figure the spacing rollers operate at the same time to aid in the rectitying effect. As the spacing rollers rotate oppositely io the bearing rollers, their exterior retaining rings 38, as they are moved circuniferentially around in the grooves of the bearing and spacing rollers respectively Will drift or be moved laterally by the engagement therewith of the bottom of the grooves- 39 of the spacing rollers in a direction opposite to the drift of the bearing roller so tliat when, for example, the left hand -end of the bearing rollers are in advance and thusdrifting toward the right, then the left hand retainin ring 38' is pinched between the inner wal of the spacing roller groove and the outer wall of the bearing roller groove, thus retarding This rectification takes place principally on the loose side of the bearing.

The roller rib 16 is preferably 'formed ot' a separate piece of metal having a noncircular hole to be slipped over the end of the stud 41, on the bearing roller, and the 'end of said stud being upset or riveted to.

hold itin place.- -The adjacent portion of the annular fiange 12 on the bearing roller is inclined or beveled to enable the rib to.

yield inwardly under the pressure of the iiiade of thin material, for example, spring steel, and have yielding capacity, and the saine is true of the annular' abutinents 13, 14

"engaging with the inwardly facing Wall of the bearing iollei groove so that there is no possibility of sharp cutting or abrasive coliiaet between the rectifyiiig portions. Any sudden endwise strain or shock is taken up smoothly an'd does not interfere with the 'proper operation. The abutiiients can be convex or rounded in shape, as shown, to provide more effective elasticity. A cushion 43 of felt or other elastic material is interposed between the abutment 13 and the in-v ner bearing member to aid in this yieldingaction and to adjust. the longitudinal position of the bearing. Said aliutiiieiit 13 floats or is movable longitudinally between the bur 20 vand this' cushion. lllasticity oit' the roller rib may be attained by t'oriiiiiig it as an extension from the shoulder member 12, both of these members being toiiiied iii one piece as shown at 28 in Fig. 7.

Fig. 8 shows the application of the invention to a vehicle Wheel bearing wherein the Said abutments ai'e also outer bearing member is formed as a sleeve in a wheel hub 46, and the inner bearing member is a spindle 47.

'1`lie construction as to the rectifying devices is as shown -in Fig. 1, except that instead of separate shoulder and rib members on the bearing roller, the shoulder 12 and roller rib 15 are formed integral with the roller by turning up an 'enlargement on the end ot' tlie bearing roller orl by liannnering. Spacing means may also be modified, as

shown in this figure, consisting, for example,l

of a short roller having end portions running on the bearing roller andhaving annular flanges 51 running within the central groove o2 on the bearing roller, the inner and outer retaining rings 53, 54 running between these annular flanges. In this case the abutment member 13 is clamped between the bur 20 and the cushion 43.

In each of the forms shown in. Figs. 1 and 8, the ribs and the abutment engaging wall of the grooves are between the abutments, so that only that wall of the groove and that wall of thev rib which are farthest from the midlength of the roller are adapted to lengage with said abutments, this being desirable-for the rectifying operation.

FigS. 9 and 10 show theapplication ofthe invention to a crank or wrist pin bearing, 57 designating-the'inner bearing member or wrist pin, and 58 designates the outer bearing member formed as a sleeve or cylinderV held in place on the cross head 59 by a yoke member 60. The bearing rollers 61 rolling` between said bearing members are rovided with rib portions 62, preferably e astic, of

greater diameter than the rollers. In this case the abutment means 63 is shown as formed directly on the inner bearing member and rotating therewith, and abutment means 64 as formed at the end of a sleeve so as to become elastic. The bearing rollers are grooved or recessed at 65 to permit inward deflection of said roller ribs. As shown in these figures spacin rollers may be dispensed with and any suita le means used, for example, a band 66 bent in sinuous forni to provide seats or depressions 67 receiving and engaging nec-ks 68 of the bearing rollers. In this form of bearing rollers rectification is attained solely by the contact betweenv the inner and outer bearing member abutments '63, 64 and the outwardly facing walls of the roller ribs 62.

Fig. 11 shows a bearingwherein the rectification isf similar to Fig. 9, tlie bearing rollers 70 having ribs 71 engaging with abutments 72 on the inner bearing member 73 formed as a sleeve on a journal G9 and with abutineiits 74 on the outer bearing mem-- flat ring 7G at each end of the bearing in which the bearing rollers 70 are journaled.

' This bearingis assembled by slitting a portion of the sleeve, as indicated in dotted lines at 78, and bending it back thus allowing a space to permit the entering of the. roller ribs before being riveted to the rollers. In this ligure an elastic pad -77 is shown' outwardly, that is, in the direction toward 4the larger end of the roller., 79, 8 0 designates the double conical inner bearing member and 81 the double conical outer bearing member, thebearing rollers 83 running between said bearing. members and being spaced apart by-collars 82 in which the ends.

of the bearing rollers 83 are journaled, On the inner bearing member are provided annular abutment members 85 and 86 extending into grooved'portions 87 of the `bearing I rollers and engaging with the walls of such grooves which are farthest from mid length othe rollers, the outward pressure above referred to on the bearing members nbeing the means of` holding them in position to insure such engagement.v Bearing abutment member 86 is shown a`an elastic ioating rib.

Fig. 13 shows a form of the invention in which a set of ball bearings 88 takes the end thrust of the bearing members. Similar end thrust devices can be applied to the various forms illustrated for bearii'igs where t-he end thrust is heavy and continual.' In this figure is shown a form of the invention wherein the annular rib 89 on the inner bearing member 90 is itself rigid, but is supported by elastic means 91 in the form of a collar or washer of elastic material such as felt, rubber or leather between it and the end of the inner beari sleeve 90, therebyl attaining the effects o elastic contact. This iigurealso shows the rectifying use of the spacing rollers 93 which extend beyondthe bearing rollers to receive spacing rings 94.'

The ribs 89 are here used as the means for the longitudinal retainers of the spacing' rollers 93, the grooves 95 straddllng said 'ribs 89 and the walls of grooves nearest mid length of spacingA rollers engaging longitudinally with said ribs, while the other walls of grooves are free from engagement. The ribs '89 have no notches to prevent rotating and are also free to move longitudil/lally outward, but their inward movement as well as rotating movement is limited' by -contacting with the elastic means 91.

Certain features of the device herein i'- 'melt relating to the rectifying means are disclosed in application No. 449,155, filed Aug. 18,1908, which are not therein claimed, said disclosure having been transferred to said application from my prior application No. 832,294, tiled Aug. 27, 1906.

l/Vhat I claim is ,A

l. A roller bearing comprising bearing 'members and bearing rollers, the bearing rollers and .one of the bearing members having interengaging ribs and abutments, said ribs being elastic. l

2. In a roller bearing, rollers having elastic ribs at one end, and means for engaging with. said ribs to cause said ends to each advaice or be retarded relatively to the other en 3. A roller bearing comprising bearing members, rollers, and abutments 1n connec- 5 tion with -the bearing members and engaged b the-rollers .to take the end thrust, said agutmentsbein elastic,-

4:. A roller members and bearin bearing lmembers, an

aring comprising bearing rollers, one of the the bearing. rollers V,having interengaging ribs and abutments,

saidribs bein elastic, and vhaving a clearance on4 the side ceivin'g side to allow yielding thereof.

5.,A roller bearing comprising bearing members and bearin rollers,said bearing rollers and one of sai bearing members having in terengaging abutments and ribs, and longitudinall yielding supporting means for one of said abutments.

G. A' roller bearing comprising inner and outer Vbearing members and bearing rollers therebetween, each roller havin a groove near one end, an abutment on the inner bearing member in position for engaging with one of the walls of each of said grooves, 'said abutment being free to movelongitudinally outward from the mid length of the roller, and means for limiting the. inward movementthereof.'

'7. In a roller bearing, the combination of inner and outer bearing members with bearing rollers, of a floating abutment longitudinally movable on a bearing member, means for limiting the inward movement of said abutment, and means for preventing rotation of said abutment on the bearing member which supports it.

8. In a roller bearing, the combination of inner and outer bearing members, bearing rollers and spacing rollers, and an annulai` retainer, said spacing rollers bein grooied to receive said retainer, the'wal s of said grooves nearest the mid length of said rollers engaging said retainer, and means'for holding the retainer free from engagement with the other wall, and the bearing rollers having grooves to receive said retainer and engaging therewith by the wall of the grldoves farthest from the mid length of the ro er.

away from the pressure re- 9. A roller bearing comprising inner and outer bearing members, rollers between said members, abutments on the bearing members and ribs on the rollers engaging said abutments to take end thrust, smid ribs being elastic.

l0. A roller bearing comprising inner and outer bearing members, rollers between said members, abutments on the bearing 'members -:1nd ribs on the rollers engaging said abutments to take end thrust, said abutments comprising yielding elastic portions to elasticnlliv resist the end thrust.

ll. A roller bearing comprising inner and outer bearing members, rollers between said members, abutments on the bearing members and ribs on said rollers engaging said abutments to take end thrust, sil-id abutments and ribs being elastic.

ln testimony whereof, I lhave hereunto set my lm'nd at Los Angeles, California, this 11th (luy of Merch 1907. i

OSWALD F. 7 AH N VIn presence of- ARTHUR P. KNIGHT, FRANK L. A. GRAHAM. 

